arch/powerpc/include/asm/compat.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_COMPAT_H
   3 #define _ASM_POWERPC_COMPAT_H
   4 #ifdef __KERNEL__
   5 /*
   6  * Architecture specific compatibility types
   7  */
   8 #include <linux/types.h>
   9 #include <linux/sched.h>
  10
  11 #include <asm-generic/compat.h>
  12
  13 #define COMPAT_USER_HZ          100
  14 #ifdef __BIG_ENDIAN__
  15 #define COMPAT_UTS_MACHINE      "ppc\0\0"
  16 #else
  17 #define COMPAT_UTS_MACHINE      "ppcle\0\0"
  18 #endif
  19
  20 typedef u32             __compat_uid_t;
  21 typedef u32             __compat_gid_t;
  22 typedef u32             __compat_uid32_t;
  23 typedef u32             __compat_gid32_t;
  24 typedef u32             compat_mode_t;
  25 typedef u32             compat_dev_t;
  26 typedef s16             compat_nlink_t;
  27 typedef u16             compat_ipc_pid_t;
  28 typedef u32             compat_caddr_t;
  29 typedef __kernel_fsid_t compat_fsid_t;
  30
  31 struct compat_stat {
  32         compat_dev_t    st_dev;
  33         compat_ino_t    st_ino;
  34         compat_mode_t   st_mode;
  35         compat_nlink_t  st_nlink;
  36         __compat_uid32_t        st_uid;
  37         __compat_gid32_t        st_gid;
  38         compat_dev_t    st_rdev;
  39         compat_off_t    st_size;
  40         compat_off_t    st_blksize;
  41         compat_off_t    st_blocks;
  42         old_time32_t    st_atime;
  43         u32             st_atime_nsec;
  44         old_time32_t    st_mtime;
  45         u32             st_mtime_nsec;
  46         old_time32_t    st_ctime;
  47         u32             st_ctime_nsec;
  48         u32             __unused4[2];
  49 };
  50
  51 struct compat_flock {
  52         short           l_type;
  53         short           l_whence;
  54         compat_off_t    l_start;
  55         compat_off_t    l_len;
  56         compat_pid_t    l_pid;
  57 };
  58
  59 #define F_GETLK64       12      /*  using 'struct flock64' */
  60 #define F_SETLK64       13
  61 #define F_SETLKW64      14
  62
  63 struct compat_flock64 {
  64         short           l_type;
  65         short           l_whence;
  66         compat_loff_t   l_start;
  67         compat_loff_t   l_len;
  68         compat_pid_t    l_pid;
  69 };
  70
  71 struct compat_statfs {
  72         int             f_type;
  73         int             f_bsize;
  74         int             f_blocks;
  75         int             f_bfree;
  76         int             f_bavail;
  77         int             f_files;
  78         int             f_ffree;
  79         compat_fsid_t   f_fsid;
  80         int             f_namelen;      /* SunOS ignores this field. */
  81         int             f_frsize;
  82         int             f_flags;
  83         int             f_spare[4];
  84 };
  85
  86 #define COMPAT_RLIM_INFINITY            0xffffffff
  87
  88 typedef u32             compat_old_sigset_t;
  89
  90 #define _COMPAT_NSIG            64
  91 #define _COMPAT_NSIG_BPW        32
  92
  93 typedef u32             compat_sigset_word;
  94
  95 #define COMPAT_OFF_T_MAX        0x7fffffff
  96
  97 static inline void __user *arch_compat_alloc_user_space(long len)
  98 {
  99         struct pt_regs *regs = current->thread.regs;
 100         unsigned long usp = regs->gpr[1];
 101
 102         /*
 103          * We can't access below the stack pointer in the 32bit ABI and
 104          * can access 288 bytes in the 64bit big-endian ABI,
 105          * or 512 bytes with the new ELFv2 little-endian ABI.
 106          */
 107         if (!is_32bit_task())
 108                 usp -= USER_REDZONE_SIZE;
 109
 110         return (void __user *) (usp - len);
 111 }
 112
 113 /*
 114  * ipc64_perm is actually 32/64bit clean but since the compat layer refers to
 115  * it we may as well define it.
 116  */
 117 struct compat_ipc64_perm {
 118         compat_key_t key;
 119         __compat_uid_t uid;
 120         __compat_gid_t gid;
 121         __compat_uid_t cuid;
 122         __compat_gid_t cgid;
 123         compat_mode_t mode;
 124         unsigned int seq;
 125         unsigned int __pad2;
 126         unsigned long __unused1;        /* yes they really are 64bit pads */
 127         unsigned long __unused2;
 128 };
 129
 130 struct compat_semid64_ds {
 131         struct compat_ipc64_perm sem_perm;
 132         unsigned int sem_otime_high;
 133         unsigned int sem_otime;
 134         unsigned int sem_ctime_high;
 135         unsigned int sem_ctime;
 136         compat_ulong_t sem_nsems;
 137         compat_ulong_t __unused3;
 138         compat_ulong_t __unused4;
 139 };
 140
 141 struct compat_msqid64_ds {
 142         struct compat_ipc64_perm msg_perm;
 143         unsigned int msg_stime_high;
 144         unsigned int msg_stime;
 145         unsigned int msg_rtime_high;
 146         unsigned int msg_rtime;
 147         unsigned int msg_ctime_high;
 148         unsigned int msg_ctime;
 149         compat_ulong_t msg_cbytes;
 150         compat_ulong_t msg_qnum;
 151         compat_ulong_t msg_qbytes;
 152         compat_pid_t msg_lspid;
 153         compat_pid_t msg_lrpid;
 154         compat_ulong_t __unused4;
 155         compat_ulong_t __unused5;
 156 };
 157
 158 struct compat_shmid64_ds {
 159         struct compat_ipc64_perm shm_perm;
 160         unsigned int shm_atime_high;
 161         unsigned int shm_atime;
 162         unsigned int shm_dtime_high;
 163         unsigned int shm_dtime;
 164         unsigned int shm_ctime_high;
 165         unsigned int shm_ctime;
 166         unsigned int __unused4;
 167         compat_size_t shm_segsz;
 168         compat_pid_t shm_cpid;
 169         compat_pid_t shm_lpid;
 170         compat_ulong_t shm_nattch;
 171         compat_ulong_t __unused5;
 172         compat_ulong_t __unused6;
 173 };
 174
 175 static inline int is_compat_task(void)
 176 {
 177         return is_32bit_task();
 178 }
 179
 180 #endif /* __KERNEL__ */
 181 #endif /* _ASM_POWERPC_COMPAT_H */